/*
 * Copyright 2018- The Pixie Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

import * as React from 'react';

const useIsMounted: () => React.MutableRefObject<boolean> = () => {
  const mountedRef = React.useRef<boolean>(false);
  React.useEffect(() => {
    mountedRef.current = true;
    return () => {
      mountedRef.current = false;
    };
  });
  return mountedRef;
};

export default useIsMounted;
